CN112415295B - Method for testing service life of aluminum electrolytic capacitor of air conditioner outdoor unit and air conditioner - Google Patents
Method for testing service life of aluminum electrolytic capacitor of air conditioner outdoor unit and air conditioner Download PDFInfo
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- CN112415295B CN112415295B CN201910784673.3A CN201910784673A CN112415295B CN 112415295 B CN112415295 B CN 112415295B CN 201910784673 A CN201910784673 A CN 201910784673A CN 112415295 B CN112415295 B CN 112415295B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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Abstract
The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner comprises the steps of setting a rated test working condition; sampling real-time temperatures of a plurality of temperature sampling points; judging whether the real-time temperature meets the set test conditions; if the real-time temperature meets the set test conditions, recording the real-time temperature, and calculating the estimated service life of the aluminum electrolytic capacitor by using the real-time temperature; selecting the minimum value as the service life of the aluminum electrolytic capacitor under the current rated test working condition; the first temperature sampling point is arranged on one side, close to the heat exchanger, of the aluminum electrolytic capacitor, the second temperature sampling point is arranged on one side, far away from the first heat exchanger, of the aluminum electrolytic capacitor, the third temperature sampling point is arranged between the first temperature sampling point and the second temperature sampling point and is located on a normal vector of the end face of the first heat exchanger, and the first heat exchanger is matched with an electric control module of the air conditioner outdoor unit; the test conditions were set as: and in the set effective period, the real-time temperature change value is less than or equal to the set value. The invention has the advantage of high test precision.
Description
Technical Field
The invention belongs to the technical field of air conditioning equipment, and particularly relates to a method for testing the service life of an aluminum electrolytic capacitor of an air conditioner outdoor unit and an air conditioner adopting the testing method.
Background
High temperature can influence the life of electronic components in the air conditioning system, and too high temperature rise can lead to electronic component failure to lead to whole air conditioning system shut down, trouble or even accident. In order to verify whether the temperature rise design of the selected components meets the specification requirements, particularly, temperature rise tests must be carried out on key components such as electrolytic capacitors, relays and the like. Particularly, the aluminum electrolytic capacitor used in the PFC power circuit of the air conditioner mainly plays a role in storing energy so as to ensure the voltage required by the normal work of the compressor.
The service life of the aluminum electrolytic capacitor is directly related to the temperature, and the service life calculation of the aluminum electrolytic capacitor involves the temperature inside the electrolytic capacitor during operation and the temperature of the surrounding environment in which the electrolytic capacitor is operated. The internal temperature of the electrolytic capacitor during operation is usually measured by using a sample provided by an electrolytic capacitor manufacturer and provided with internal temperature test points. However, there is no standard way to measure the temperature of the surrounding environment where the electrolytic capacitor operates. Especially, the service life of the aluminum electrolytic capacitor arranged in the outdoor unit of the air conditioner is directly related to the temperature of the peripheral environment, the service life of the electrolytic capacitor obtained by various testing modes is greatly different, and the accurate service life cannot be obtained.
Disclosure of Invention
The invention provides a method for testing the service life of an aluminum electrolytic capacitor of an air conditioner outdoor unit, aiming at the problems that the service life of the aluminum electrolytic capacitor in the air conditioner outdoor unit cannot be accurately tested due to various testing modes and large result deviation in the prior art.
The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner is characterized by comprising the following steps of:
setting at least one rated test working condition and controlling the air conditioner outdoor unit to operate according to the rated test working condition;
sampling real-time temperatures of a plurality of temperature sampling points;
judging whether the real-time temperature of each temperature sampling point meets a set test condition;
if the real-time temperature of the temperature sampling point meets the set test condition, recording the corresponding real-time temperature, and calculating the estimated service life of the aluminum electrolytic capacitor by using the recorded real-time temperature;
selecting the minimum value of the estimated lives of the plurality of aluminum electrolytic capacitors as the service life of the aluminum electrolytic capacitor under the current rated test condition;
the temperature sampling points at least comprise a first temperature sampling point, a second temperature sampling point and a third temperature sampling point which are positioned in an air conditioner outdoor unit, wherein the first temperature sampling point is arranged on one side, close to the heat exchanger, of the aluminum electrolytic capacitor, the second temperature sampling point is arranged on one side, far away from the first heat exchanger, of the aluminum electrolytic capacitor, the third temperature sampling point is arranged between the first temperature sampling point and the second temperature sampling point and is positioned on a normal vector of the end surface of the first heat exchanger, and the first heat exchanger is matched with an electric control module of the air conditioner outdoor unit; the set test conditions are as follows: and in the set effective period, the real-time temperature change value is less than or equal to the set value.
Further, the method also comprises the following steps:
sampling the internal temperature rise value of the aluminum electrolytic capacitor;
judging whether the change value of the internal temperature rising value of the aluminum electrolytic capacitor is less than or equal to a set value in a set effective period;
and if the change value of the internal temperature rise value of the aluminum electrolytic capacitor is less than or equal to the set value, calculating the estimated service life of the aluminum electrolytic capacitor by using the internal temperature rise value and the recorded real-time temperature.
Further, the estimated lifetime is calculated by the following formula:
wherein L is X To estimate the lifetime, L 0 Rated service life, T, of the aluminum electrolytic capacitor at rated maximum service temperature 0 The rated maximum service temperature of the aluminum electrolytic capacitor; t is a unit of n Is warmMeasuring the real-time temperature of the sampling point; delta T n And K is the ripple current temperature rise acceleration coefficient.
Furthermore, the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are distributed on the same horizontal plane parallel to the end face of the first heat exchanger.
Preferably, the distance between the plane of the first temperature sampling point, the plane of the second temperature sampling point and the plane of the top end of the aluminum electrolytic capacitor is [1cm,2cm ].
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
further, the method also comprises the following steps:
if the real-time temperature of the temperature sampling point meets the set test condition, further judging whether the real-time temperature is less than or equal to a set environment temperature threshold value;
if the real-time temperature is less than or equal to the set environmental temperature threshold value, the estimated service life of the aluminum electrolytic capacitor is calculated by using the set environmental temperature threshold value.
Further, the rated test working condition comprises a refrigeration mode rated test working condition and a heating mode rated test working condition.
Furthermore, the refrigerating mode rated test working condition comprises a plurality of refrigerating mode rated load test working conditions divided according to the load of the air conditioner room, and the heating mode rated test working condition comprises a plurality of heating mode rated load test working conditions divided according to the load of the air conditioner room, so that the service life of the aluminum electrolytic capacitor under each refrigerating mode rated load test working condition and each heating mode rated load test working condition is respectively tested;
distributing a set load weight ratio to each refrigerating mode rated load test working condition and each heating mode rated load test working condition, wherein the set load weight ratio is larger than zero, and the sum of the set load weight ratios is equal to 1;
calculating the corrected service life, wherein the corrected service life is the product of the service life of the aluminum electrolytic capacitor measured under the current refrigeration mode rated load test working condition and the corresponding set load weight ratio or the product of the service life of the aluminum electrolytic capacitor measured under the current heating mode rated load test working condition and the corresponding set load weight ratio;
and calculating the sum of the corrected service life of the refrigerating mode rated test working condition and the heating mode rated test working condition to obtain the service life measured value of the aluminum electrolytic capacitor.
Furthermore, after the real-time temperatures of the plurality of temperature sampling points are sampled, the temperature rise curve of the real-time temperatures is recorded.
The service life of an aluminum electrolytic capacitor in the air conditioner outdoor unit is tested by the following method:
setting at least one rated test working condition and controlling the air conditioner outdoor unit to operate according to the rated test working condition;
sampling real-time temperatures of a plurality of temperature sampling points;
judging whether the real-time temperature of each temperature sampling point meets a set test condition;
if the real-time temperature of the temperature sampling point meets the set test condition, recording the corresponding real-time temperature, and calculating the estimated service life of the aluminum electrolytic capacitor by using the recorded real-time temperature;
selecting the minimum value of the estimated lives of the plurality of aluminum electrolytic capacitors as the service life of the aluminum electrolytic capacitor under the current rated test condition;
the temperature sampling points at least comprise a first temperature sampling point, a second temperature sampling point and a third temperature sampling point which are positioned in an air conditioner outdoor unit, wherein the first temperature sampling point is arranged on one side, close to the heat exchanger, of the aluminum electrolytic capacitor, the second temperature sampling point is arranged on one side, far away from the first heat exchanger, of the aluminum electrolytic capacitor, the third temperature sampling point is arranged between the first temperature sampling point and the second temperature sampling point and is positioned on a normal vector of the end surface of the first heat exchanger, and the first heat exchanger is arranged in an electric control module of the air conditioner outdoor unit; the set test conditions are as follows: and in the set effective period, the real-time temperature change value is less than or equal to the set value.
The influence of heat exchange of the first heat exchanger on the working environment temperature of the aluminum electrolytic capacitor can be fully detected by sampling the temperatures of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point, so that the working environment temperature around the aluminum electrolytic capacitor during the actual working of the air conditioner can be completely and accurately reflected, the worst working condition is fully considered by selecting the minimum value of the estimated service life, the service life of the calculated aluminum electrolytic capacitor basically conforms to the real service condition, and the accuracy is high.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flowchart of an embodiment of a method for testing the service life of an aluminum electrolytic capacitor of an outdoor unit of an air conditioner according to the present invention;
FIG. 2 is a flowchart illustrating another exemplary embodiment of a method for testing the lifetime of an aluminum electrolytic capacitor of an outdoor unit of an air conditioner according to the present invention;
FIG. 3 is a flow chart of the calculation of the measured value of the service life of the aluminum electrolytic capacitor according to the load weight ratio.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
The terms "first," "second," "third," and the like in the description and in the claims, and in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. One skilled in the art will appreciate that the embodiments described herein can be combined with other embodiments.
Unlike other electronic devices, since the internal refrigeration cycle of the air conditioner is a multi-component coupled system and the air conditioner outdoor unit is in a semi-sealed state as a whole, the operation states of devices such as a compressor, a heat exchanger, an outdoor fan and an electric control module provided in the air conditioner outdoor unit may vary with the variation of the operating conditions and loads. In order to ensure the normal operation of electronic elements in the electronic control module, an electronic control box body is arranged in the air conditioner outdoor unit, and a control panel provided with an aluminum electrolytic capacitor is arranged in the electronic control box body. The electric control box body is also provided with a first heat exchanger in a matching way, and the first heat exchanger is mainly used for avoiding irreversible damage caused by the fact that power devices such as transistors, diodes, silicon bridges, power modules and the like work at overhigh temperature. The first heat exchanger is usually composed of a plurality of heat dissipation fins, which can be disposed in the air duct of the outdoor fan, and takes away the corresponding heat by using the air flow in the air duct of the heat exchanger. The first heat exchanger can also be arranged in the electric control box body, and the fan is used for driving airflow in the cavity provided with the compressor in a rotating mode, so that the airflow can achieve the purpose of heat dissipation through the radiator. The first heat exchanger may also be another type of heat exchanger to achieve the same technical effect. The invention designs and provides the following method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner based on the fact that heat exchange generated by the work of the first heat exchanger is an important factor influencing the ambient temperature of the aluminum electrolytic capacitor.
Referring to fig. 1, the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner is measured in the following manner. Specifically, the method comprises the following steps:
firstly, setting at least one rated test working condition and controlling the air conditioner outdoor unit to operate according to the rated test working condition. The rated test condition is preferably set according to the capacity of the air conditioner, and may be any one of a heating mode, a cooling mode, and a dehumidifying mode. Since the operation principle of the cooling mode and the dehumidifying mode is substantially the same, the dehumidifying mode will not be separately described hereinafter.
And sampling real-time temperatures of a plurality of temperature sampling points. Since the lifetime of the aluminum electrolytic capacitor is mainly affected by the ambient temperature during operation, in this embodiment, the temperature sampling points at least include a first temperature sampling point, a second temperature sampling point, and a third temperature sampling point in the outdoor unit of the air conditioner. The method is characterized in that the position of an aluminum electrolytic capacitor is taken as a reference point, a first temperature sampling point is arranged on one side, close to a first heat exchanger, of the aluminum electrolytic capacitor, a second temperature sampling point is arranged on one side, far away from the first heat exchanger, of the aluminum electrolytic capacitor, and a third temperature sampling point is arranged between the first temperature sampling point and the second temperature sampling point and located on any normal vector of the end face of the first heat exchanger. The end face of the first heat exchanger is a heat exchange surface of the first heat exchanger, which has the same extension direction with the panel of the outdoor unit casing, and the end face can be arranged in parallel with the panel of the outdoor unit casing, or can form a certain included angle with the panel of the outdoor unit casing, and the shape of the end face is not limited. And sampling the real-time temperatures of the plurality of temperature sampling points according to a set sampling frequency.
And further judging whether the real-time temperature of each temperature sampling point meets a set test condition, namely judging whether the real-time temperature change value of the temperature sampling is less than or equal to a set value in a set effective period.
And if the real-time temperature of the temperature sampling point meets the set test condition, recording the corresponding real-time temperature.
Specifically, the determination processes of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are independent of each other. That is, if the real-time temperature sampled by the first temperature sampling point satisfies the set test condition, the real-time temperature of the first temperature sampling point is recorded. And if the real-time temperatures of the first temperature sampling point and the second temperature sampling point both meet the set test conditions, recording the real-time temperatures of the first temperature sampling point and the second temperature sampling point. If the real-time temperatures of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point all meet the set test conditions, the real-time temperatures of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are recorded, and the temperature sampling processes of the three temperature sampling points are not influenced.
Further, the estimated life of the aluminum electrolytic capacitor is calculated using the recorded real-time temperatures, respectively.
The estimated lifetime of the aluminum electrolytic capacitor can be calculated by the following formula,
wherein L is X To estimate the lifetime, in hours, L 0 The rated service life of the aluminum electrolytic capacitor at the rated maximum service temperature is represented by the unit of hour, T 0 The rated maximum use temperature of the aluminum electrolytic capacitor is given in centigrade degrees; t is n Is the real-time temperature in degrees celsius of the temperature sampling point. Wherein L is 0 、T 0 Provided by manufacturers of aluminum electrolytic capacitors.
And calculating the estimated service life of one aluminum electrolytic capacitor by using each recorded real-time temperature to obtain the estimated service lives of a plurality of aluminum electrolytic capacitors.
And selecting the minimum value of the estimated lives of the plurality of aluminum electrolytic capacitors as the service life of the aluminum electrolytic capacitor under the current rated test condition.
The influence of heat exchange of the first heat exchanger on the working environment temperature of the aluminum electrolytic capacitor can be fully detected by sampling the temperatures of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point, so that the working environment temperature around the aluminum electrolytic capacitor during the actual working of the air conditioner can be completely and accurately reflected, the worst working condition is fully considered by selecting the minimum value of the estimated service life, the service life of the calculated aluminum electrolytic capacitor basically conforms to the real service condition, and the accuracy is high.
Referring to fig. 2, a more accurate method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner is shown, which further considers the influence of the internal temperature rise on the service life compared with the above embodiment. Specifically, the internal temperature rise value of the aluminum electrolytic capacitor is further sampled while the real-time temperatures of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are sampled. It should be noted that, the sampling mode in the prior art is adopted for sampling the temperature rise value in the aluminum electrolytic capacitor, and the distribution points are provided by manufacturers of the aluminum electrolytic capacitor.
After the internal temperature rising value of the aluminum electrolytic capacitor is obtained through sampling, whether the internal temperature rising value of the aluminum electrolytic capacitor is smaller than or equal to a set value or not is judged in a set effective period, if the internal temperature rising value of the aluminum electrolytic capacitor is smaller than or equal to the set value and the real-time temperature obtained by any one or more of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point meets a set test condition, the estimated service life of the aluminum electrolytic capacitor is calculated through the internal temperature rising value and the recorded real-time temperature.
In the present embodiment, the estimated lifetime is calculated by the following formula:
Compared with the estimated life formula in the first embodiment, the estimated life formula in this embodiment incorporates the internal temperature rise value and the ripple current temperature rise acceleration coefficient into the calculation process, and can further improve the calculation accuracy of the service life of the aluminum electrolytic capacitor.
In the two embodiments, the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are distributed on the same horizontal plane parallel to the end face of the first heat exchanger. The temperature sensing elements arranged at the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are kept suspended and are not in contact with other objects, such as a wiring harness, a box wall and the like. The distance between the plane of the first temperature sampling point, the plane of the second temperature sampling point and the plane of the top end of the aluminum electrolytic capacitor is [1cm,2cm ], the distance is preferably set to be 1cm, and the sensitivity of the temperature sensing element is +/-0.1 ℃. The set active period is preferably set to 20 minutes and the set value is preferably set to 0.1 degrees celsius. That is, if the variation value of the sampled real-time temperature within 20 minutes is 0.1 degrees celsius or less, the real-time temperature is considered to satisfy the set test condition. Similarly, if the change value of the internal temperature rise value of the aluminum electrolytic capacitor in 20 minutes is equal to or less than the set value, that is, equal to or less than 0.1 degree centigrade, the estimated lifetime of the aluminum electrolytic capacitor is calculated using the internal temperature rise value and the recorded real-time temperature.
As a protection algorithm for providing abnormal data, the method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner, provided by the invention, further comprises the following steps of:
after the real-time temperature is sampled, if the real-time temperature of the temperature sampling point meets the set test condition, whether the real-time temperature is smaller than or equal to the set environment temperature threshold value is further judged. If the real-time temperature is less than or equal to the set environmental temperature threshold value, the estimated service life of the aluminum electrolytic capacitor is calculated according to the environmental temperature threshold value. And if the real-time temperature of the temperature sampling point is greater than the set environmental temperature threshold value, calculating the estimated service life of the aluminum electrolytic capacitor by using the recorded real-time temperature. A preferred set ambient temperature threshold may be set at 40 degrees celsius to cull the estimated lifetime calculated from ambient temperatures below 40 degrees celsius so that the calculated result fits the real situation more.
The first temperature sampling point, the second temperature sampling point and the third temperature sampling point can be further provided with more groups according to actual requirements, and are not further limited herein. After the real-time temperatures of the plurality of temperature sampling points are sampled, the temperature rise curve of the real-time temperatures is recorded, so that testers can be helped to visually observe the change trend of the internal temperature and the environmental temperature of the aluminum electrolytic capacitor in the operation process of the air conditioner. If the abnormal condition occurs in the aluminum electrolytic capacitor, the abnormal data can be manually removed, and the accuracy of the measured data is improved.
It is easy to understand that when the air conditioner works in the cooling mode and the heating mode, the working conditions of the outdoor unit are different, therefore, the rated test working conditions including the cooling mode rated test working condition and the heating mode rated test working condition can be preferably set, and corresponding tests are carried out aiming at each working condition so as to obtain the service life of the aluminum electrolytic capacitor of the air conditioner outdoor unit under the cooling mode rated test working condition and the heating mode rated test working condition.
As shown in fig. 3, a more preferable mode is to divide the refrigeration mode rated test condition into a plurality of refrigeration mode rated load test conditions according to the air conditioner room load, specifically, the refrigeration mode rated load test condition may include a refrigeration mode peak load condition, a refrigeration mode normal load condition, and a refrigeration mode light load condition. Similarly, the heating mode rated test working condition is divided into a plurality of heating mode rated load test working conditions according to the air conditioner room load, and specifically, the heating mode rated load test working condition may include a heating mode peak load working condition, a heating mode normal load working condition and a heating mode light load working condition.
And respectively testing the service life of the aluminum electrolytic capacitor under each refrigerating mode rated load test working condition and each heating mode rated load test working condition. After the service life of the aluminum electrolytic capacitor under each refrigerating mode rated load test working condition or each heating mode rated load test working condition is obtained, a data relation of one-to-one correspondence between the test working condition and the service life can be selectively established and stored in a data table form.
Preferably, each of the cooling mode rated load test operating condition and the first heating mode rated load test operating condition is further assigned a set load weight ratio. The set load weight ratio is a constant greater than zero, and the sum of the set load weight ratios is equal to 1. The set load weight ratio of each refrigerating mode rated load test working condition and each heating mode rated load test working condition is obtained according to the big data of the target use place of the air conditioner. For example, the set load weight ratio corresponding to the cooling mode normal load operating condition and the heating mode normal load operating condition is the highest; if the target use ground terminal climate frequency of the air conditioner is high, the set load weight ratio distributed by the refrigeration mode peak load working condition or the heating mode peak load working condition is higher than the set load weight ratio of the refrigeration mode light load working condition or the heating mode light load working condition; if the target use ground terminal climate of the air conditioner is low in occurrence frequency and mild in climate, the set load weight ratio allocated to the cooling mode peak load working condition or the heating mode peak load working condition is lower than that of the cooling mode light load working condition or the heating mode light load working condition.
Further calculating the corrected service life. The corrected service life is the product of the service life of the aluminum electrolytic capacitor obtained under the current refrigeration mode rated load test working condition and the corresponding set load weight ratio or the product of the service life of the aluminum electrolytic capacitor obtained under the current heating mode rated load test working condition and the corresponding set load weight ratio.
And further calculating the sum of the corrected service lives of the refrigerating mode rated test working condition and the heating mode rated test working condition to obtain the service life measured value of the aluminum electrolytic capacitor.
The measured value of the service life of the aluminum electrolytic capacitor calculated by the method is matched with different loads in a refrigerating mode and a heating mode, and the accuracy is better.
If the air conditioner to be tested also comprises a fresh air mode, an air supply mode and the like, other testing working conditions can be arranged outside the refrigerating mode rated testing working condition and the heating mode rated testing working condition, and other working condition weight ratios corresponding to the other testing working conditions are given, and the other working condition weight ratios are constants which are larger than zero. It should be noted that, if other test conditions are set, the sum of the other condition weight ratio and the set load weight ratio is equal to 1. Considering the standby working state, the shutdown test working condition can be set besides the refrigeration mode rated test working condition, the heating mode rated test working condition and other test working conditions, and corresponding shutdown working condition weight ratios are given to the shutdown working condition, and the shutdown working condition weight ratios are constants larger than zero. It should be noted that, if the shutdown test condition is set, the sum of the load weight ratio, the other test conditions, and the shutdown test condition weight ratio is set to be equal to 1. And further calculating corresponding corrected service life based on the service life tested by other testing working conditions and corresponding weight ratio of other working conditions, or calculating corresponding corrected service life based on the service life tested by the shutdown testing working conditions and the corresponding weight ratio of the shutdown testing working conditions, and summing the corrected service life under other testing working conditions and the shutdown testing working conditions with the corrected service life under the refrigeration mode rated testing working conditions and the heating mode rated testing working conditions to obtain the measured value of the service life of the aluminum electrolytic capacitor.
The embodiment of the application also provides an air conditioner and a method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner. The concrete steps of the method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner refer to the detailed description of the above embodiment and the detailed description of the attached drawings of the specification. No further description is given here, and the air conditioner adopting the air conditioner control method can achieve the same technical effects.
Embodiments of the present application also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes an air conditioner to perform part or all of the steps of any one of the methods described in the above method embodiments.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the above-described units or modules is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be an electrical or other form.
The units described as the separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one physical space, or may also be distributed on a plurality of network units, and some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for some of the features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding claims.
Claims (10)
1. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner is characterized by comprising the following steps of:
setting at least one rated test working condition and controlling the air conditioner outdoor unit to operate according to the rated test working condition;
sampling real-time temperatures of a plurality of temperature sampling points;
judging whether the real-time temperature of each temperature sampling point meets a set test condition;
if the real-time temperature of the temperature sampling point meets the set test condition, recording the corresponding real-time temperature, and calculating the estimated service life of the aluminum electrolytic capacitor by using the recorded real-time temperature;
selecting the minimum value of the estimated lives of the plurality of aluminum electrolytic capacitors as the service life of the aluminum electrolytic capacitor under the current rated test condition;
the temperature sampling points at least comprise a first temperature sampling point, a second temperature sampling point and a third temperature sampling point which are positioned in an air conditioner outdoor unit, wherein the first temperature sampling point is arranged on one side, close to a first heat exchanger, of an aluminum electrolytic capacitor, the second temperature sampling point is arranged on one side, far away from the first heat exchanger, of the aluminum electrolytic capacitor, the third temperature sampling point is arranged between the first temperature sampling point and the second temperature sampling point and is positioned on a normal vector of the end surface of the first heat exchanger, and the first heat exchanger is matched with an electric control module of the air conditioner outdoor unit; the end surface of the first heat exchanger is a heat exchange surface of the first heat exchanger, which has the same extension direction with the panel of the air conditioner outdoor unit shell; the set test conditions are as follows: and in the set effective period, the real-time temperature change value is less than or equal to the set value.
2. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 1,
further comprising the steps of:
sampling the internal temperature rise value of the aluminum electrolytic capacitor;
judging whether the change value of the internal temperature rising value of the aluminum electrolytic capacitor is less than or equal to a set value in a set effective period;
and if the change value of the internal temperature rise value of the aluminum electrolytic capacitor is less than or equal to the set value, calculating the estimated service life of the aluminum electrolytic capacitor by using the internal temperature rise value and the recorded real-time temperature.
3. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 2, wherein:
the estimated lifetime is calculated by the following formula:
wherein L is X To estimate the lifetime, L 0 Rated service life, T, of the aluminum electrolytic capacitor at rated maximum service temperature 0 The rated maximum service temperature of the aluminum electrolytic capacitor; t is n The real-time temperature of the temperature sampling point is obtained; delta T n And K is the ripple current temperature rise acceleration coefficient.
4. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in any one of claims 1 to 3, wherein:
the first temperature sampling point, the second temperature sampling point and the third temperature sampling point are distributed on the same horizontal plane parallel to the end face of the first heat exchanger.
5. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 4,
the distances between the planes of the first temperature sampling point, the second temperature sampling point and the third temperature sampling point and the plane of the top end of the aluminum electrolytic capacitor are [1cm,2cm ].
6. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 4, further comprising the steps of:
if the real-time temperature of the temperature sampling point meets the set test condition, further judging whether the real-time temperature is less than or equal to a set environment temperature threshold value;
if the real-time temperature is less than or equal to the set environmental temperature threshold value, the estimated service life of the aluminum electrolytic capacitor is calculated by using the set environmental temperature threshold value.
7. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 6,
the rated test working conditions comprise a refrigeration mode rated test working condition and a heating mode rated test working condition.
8. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 7,
the refrigerating mode rated test working condition comprises a plurality of refrigerating mode rated load test working conditions divided according to air conditioner room loads, the heating mode rated test working condition comprises a plurality of heating mode rated load test working conditions divided according to air conditioner room loads, and the service life of the aluminum electrolytic capacitor under each refrigerating mode rated load test working condition and each heating mode rated load test working condition is respectively tested;
distributing a set load weight ratio to each refrigerating mode rated load test working condition and each heating mode rated load test working condition, wherein the set load weight ratio is larger than zero, and the sum of the set load weight ratios is equal to 1;
calculating the corrected service life, wherein the corrected service life is the product of the service life of the aluminum electrolytic capacitor measured under the current refrigeration mode rated load test working condition and the corresponding set load weight ratio or the product of the service life of the aluminum electrolytic capacitor measured under the current heating mode rated load test working condition and the corresponding set load weight ratio;
and calculating the sum of the corrected service life of the refrigerating mode rated test working condition and the heating mode rated test working condition to obtain the service life measured value of the aluminum electrolytic capacitor.
9. The method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in claim 8,
and after the real-time temperatures of the plurality of temperature sampling points are sampled, recording a temperature rise curve of the real-time temperatures.
10. An air conditioner characterized in that the method for testing the service life of the aluminum electrolytic capacitor of the outdoor unit of the air conditioner as claimed in any one of claims 1 to 9 is adopted.
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| CN107062537A (en) * | 2017-03-29 | 2017-08-18 | 青岛海尔空调电子有限公司 | The detection method and device of condenser for outdoor unit of air conditioner cleanliness factor |
| CN109340997A (en) * | 2017-07-31 | 2019-02-15 | 广东美的制冷设备有限公司 | Air conditioner power consumption weight testing method, device and computer readable storage medium |
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| CN201069461Y (en) * | 2007-06-18 | 2008-06-04 | 深圳市中传电气技术有限公司 | A life monitoring device for aluminum electrolysis capacitor in the frequency converter |
| CN202995006U (en) * | 2012-12-12 | 2013-06-12 | 国电南瑞科技股份有限公司 | Power supply detection circuit used for predicting residual life of relay protection device |
| CN104134981B (en) * | 2014-07-02 | 2016-11-23 | 邯郸美的制冷设备有限公司 | Overvoltage protection, over-voltage protection method and air-conditioner for air-conditioner |
| CN205230835U (en) * | 2015-12-21 | 2016-05-11 | 江西佳维诚电子科技有限公司 | Aluminium electrolytic capacitor base that radiating efficiency is high |
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| CN107062537A (en) * | 2017-03-29 | 2017-08-18 | 青岛海尔空调电子有限公司 | The detection method and device of condenser for outdoor unit of air conditioner cleanliness factor |
| CN109340997A (en) * | 2017-07-31 | 2019-02-15 | 广东美的制冷设备有限公司 | Air conditioner power consumption weight testing method, device and computer readable storage medium |
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